WO2016033994A1 - 一种降低组合推力轴承搅油损耗的方法 - Google Patents

一种降低组合推力轴承搅油损耗的方法 Download PDF

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WO2016033994A1
WO2016033994A1 PCT/CN2015/080008 CN2015080008W WO2016033994A1 WO 2016033994 A1 WO2016033994 A1 WO 2016033994A1 CN 2015080008 W CN2015080008 W CN 2015080008W WO 2016033994 A1 WO2016033994 A1 WO 2016033994A1
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Prior art keywords
oil
tank
thrust
lubricating oil
bearing
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PCT/CN2015/080008
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English (en)
French (fr)
Inventor
郑小康
廖毅刚
杨仕福
钟海权
张天鹏
骆林
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东方电气集团东方电机有限公司
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Priority claimed from CN201410447946.2A external-priority patent/CN104251374B/zh
Application filed by 东方电气集团东方电机有限公司 filed Critical 东方电气集团东方电机有限公司
Publication of WO2016033994A1 publication Critical patent/WO2016033994A1/zh
Priority to CONC2017/0003262A priority Critical patent/CO2017003262A2/es

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/14—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the lubricant being conveyed from the reservoir by mechanical means
    • F16N7/28—Dip lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/02—Arrangements for conditioning of lubricants in the lubricating system by cooling

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  • the invention belongs to the technical field of sliding bearings, and particularly relates to a method for reducing the oil loss of a combined thrust bearing, which is mainly used for a pumped storage generator set.
  • the combined thrust bearing is an important part of the generator set. It plays the role of supporting the weight of the whole generator. The safety and reliability of its operation are directly related to the safe and stable operation of the entire hydro-generator unit. Guide bearing pads and thrust pads are important components in thrust bearings.
  • the thrust bearing is mainly composed of a mirror plate, a thrust bush, a guide bearing bush and a bearing thrust head.
  • the mirror plate and the thrust pad are located below the guide bearing bush, and the thrust pad and the mirror plate cooperate to support the axial direction of the generator set.
  • the load, the guide bearing bush and the bearing thrust head cooperate to limit the radial oscillation of the rotation of the unit.
  • the lubricating oil supply mode of the thrust bearing is mainly immersion lubrication or direct oil lubrication.
  • Immersion lubrication refers to injecting lubricating oil into the oil tank in advance, so that the mirror plate, the thrust bush, the guide bearing bush and the bearing thrust head are all immersed in the lubricating oil.
  • the bearing thrust head and the mirror plate rotate to drive the oil to form an oil wedge between the thrust head and the guide bearing shoe and between the mirror plate and the thrust pad.
  • the thrust bush, the guide bearing bush, the mirror plate and the bearing thrust head are all immersed in the lubricating oil, and the viscosity of the lubricating oil is large, this causes the unit to generate a large amount at a high speed. Additional stirrer loss, which reduces generator operating efficiency.
  • Direct oil lubrication means that a nozzle or an oil chamber is provided at the oil inlet side of the thrust tile or the guide bearing tile, so that the cold lubricating oil directly enters the tile working surface.
  • the oil supply method is used for oil supply, the mirror plate working surface and the bearing thrust head are still immersed in the lubricating oil, and a large additional oil loss is still generated due to the large viscosity of the lubricating oil.
  • An object of the present invention is to overcome the above problems in the prior art and to provide a method for reducing the oil loss of a combined thrust bearing.
  • the invention can solve the problem that the thrust bearing is immersed in the lubricating oil during operation in the prior art, and can avoid the occurrence of the oil loss.
  • a method for reducing the oil loss of a combined thrust bearing characterized in that it comprises the following steps:
  • b Set a high-position fuel tank with a one-way exhaust valve.
  • the volume of the high-position fuel tank is larger than the volume of the lubricating oil in the area between the upper part of the bearing bush and the bottom of the thrust bush in the oil tank.
  • the oil pump is used to inject the lubricating oil in the oil tank into the high-position fuel tank.
  • the lubricating oil is injected between the mirror plate and the thrust tile, and/or injected between the bearing thrust head and the guide bearing tile, so that the lubricating oil forms a circulation between the oil groove and the high oil tank, and the high oil tank
  • the oil intake is greater than the oil discharge of the high tank;
  • the oil discharge amount of the high-position fuel tank is gradually the same as that of the high-position fuel tank through the one-way exhaust valve, and the lubricating oil liquid level in the oil tank is located below the thrust tile.
  • An oil cooler is disposed between the high level fuel tank and the fuel supply pump in the step b.
  • the high-position fuel tank in the step b is provided with a single suction valve.
  • the air in the high-position fuel tank is discharged by the one-way exhaust valve, and the pressure in the high-position fuel tank gradually increases as the oil amount in the high-position fuel tank increases. Large, until it is greater than the external air pressure, under the action of the pressure, the oil discharge of the high-position fuel tank gradually increases until the oil intake amount of the high-position fuel tank is the same, so that the lubricating oil in the high-position fuel tank is maintained at a constant state.
  • the thrust bearing when the thrust bearing is in normal operation, the lubricating oil level in the oil tank can always be under the thrust, that is, the mirror plate, the thrust bush, the guide bearing bush and the bearing thrust head are not immersed in the lubrication when the thrust bearing is in normal operation.
  • the problem that the thrust bearing must be immersed in the lubricating oil during work is solved, which not only avoids the occurrence of the oil loss, but also improves the operating efficiency of the unit.
  • an oil cooler is disposed between the high-position fuel tank and the fuel supply pump in the step b, and the hot oil entering the high-position fuel tank can be turned into cold oil, thereby ensuring rapid circulation of the lubricating oil and ensuring
  • the cold oil supply to the bearing has the advantages of simple structure and low cost.
  • the high-position fuel tank in the step b is provided with a single suction valve, and the single suction valve can increase the pressure in the high-position fuel tank when the oil supply pump is powered down or stopped, so that the high-position fuel tank can be like a fuel supply pump.
  • the single suction valve can increase the pressure in the high-position fuel tank when the oil supply pump is powered down or stopped, so that the high-position fuel tank can be like a fuel supply pump.
  • continue to supply oil to the thrust bearing bush and the guide bearing bush with the original oil discharge which is beneficial to avoid dry friction or burning.
  • the lubricating oil in the high tank is completely discharged into the oil tank, the mirror plate, the thrust bush, the guide bearing bush and the bearing thrust head are all immersed in the lubricating oil, so that the thrust bearing can be supplied like the immersion oil supply in the prior art. Oil ensures safe and reliable operation of thrust bearings.
  • FIG. 1 is a schematic structural view of a fuel supply pump in a normal operation according to the present invention
  • Figure 2 is a schematic view showing the structure of the oil supply pump when it is stopped in the present invention
  • the markings in the figure are: 1, high fuel tank, 2, oil cooler, 3, oil supply pump, 4, oil return pipe, 5, oil drain main pipe, 6, first oil supply ring pipe, 7, second oil supply ring pipe 8, oil tank, 9, guide bearing tile, 10, thrust tile, 11, fuel injection pipe, 12, single suction valve, 13, one-way exhaust valve, 14, bearing thrust head, 15, mirror plate.
  • a method for reducing the oil loss of a combined thrust bearing includes the following steps:
  • the lubricating oil is injected into the oil groove 8, so that the guide bearing shoe 9 is immersed in the lubricating oil, and at this time, the thrust tile 10, the mirror plate 15 and the bearing thrust head 14 are all immersed in the lubricating oil;
  • a high-position fuel tank 1 with a one-way exhaust valve 13 is provided.
  • the volume of the high-position fuel tank 1 is larger than the volume of the lubricating oil in the region between the upper portion of the guide bearing shoe 9 and the bottom of the thrust shoe 10 in the oil groove 8, and the oil supply pump 3 is used.
  • the lubricating oil in the oil tank 8 is injected into the high-position oil tank 1, and the lubricating oil is injected into the mirror plate 15 and the thrust shoe 10 through the high-position oil tank 1, and/or injected between the bearing thrust head 14 and the guide bearing shoe 9, so that the lubricating oil A circulation is formed between the oil tank 8 and the high-position fuel tank 1, and the oil intake amount of the high-position oil tank 1 is greater than the oil discharge amount of the high-position fuel tank 1;
  • the oil discharge amount of the high-position fuel tank 1 and the oil-intake amount of the high-position fuel tank 1 are gradually the same through the one-way exhaust valve 13, and the pressure in the high-position fuel tank 1 is in equilibrium.
  • the lubricating oil level in the oil tank 8 is located below the thrust tile 10, and the thrust bearing starts normal operation.
  • the oil cooler 2 is disposed between the high-position fuel tank 1 and the fuel supply pump 3 in the step b, and the hot oil pumped by the oil supply pump 3 can be converted into cold oil by the oil cooler 2.
  • the volume of the high-position oil tank 1 in the step b is greater than the volume of the lubricating oil in the region between the upper portion of the guide bearing shoe 9 and the bottom of the thrust bearing 10 in the oil groove 8, which means that the volume of the high-position oil tank 1 is larger than that in the oil tank 8
  • the high oil tank 1 and the oil tank 8 are connected through the oil return pipe 4, and the oil supply pump 3 and the oil cooler 2 are connected to the oil return pipe 4, the oil tank 8, the oil supply pump 3, the oil cooler 2, the high oil tank 1 and the thrust.
  • the bearings form a lubricating oil circulation system through pipes.
  • the oil supply to the thrust pad 10 and/or the guide bearing shoe 9 in the high position tank 1 in the step b can be achieved by the following structure:
  • an oil discharge pipe 5 is connected to the oil discharge port of the high oil tank 1, and a first oil supply pipe 6 with the fuel injection pipe 11 is disposed on the outer diameter side of the guide bearing shoe 9,
  • An oil supply ring pipe 6 is connected to the oil discharge manifold 5, and the fuel injection pipe pipe 11 is disposed at the oil inlet side of the guide bearing shoe 9.
  • an oil discharge pipe 5 is connected to the oil discharge port of the high oil tank 1, and a second oil supply pipe 7 with the fuel injection pipe 11 is disposed on the outer diameter side of the thrust tile 10, and the second supply is provided.
  • the oil ring pipe 7 is connected to the oil discharge manifold 5, and the fuel injection pipe pipe 11 is disposed at the oil inlet side of the thrust tile 10.
  • an oil discharge pipe 5 is arranged to pass through the three-way joint and the first oil supply ring pipe 6 and the second oil supply ring respectively.
  • oil can be supplied to the guide bearing shoes 9 and the thrust shoes 10 at the same time.
  • the implementation principle of this embodiment is that before the thrust bearing is operated, cold lubricating oil is injected into the oil groove 8, so that the guide bearing shoe 9 is immersed in the lubricating oil, and at this time, the thrust tile 10, the mirror plate 15 and the bearing thrust head 14 are both Soaking in the lubricating oil; starting the oil supply pump 3, the oil supply pump 3 pumps the lubricating oil in the oil tank 8 into the high oil tank 1 through the return pipe. Among them, during the pumping process, the oil cooler 2 turns the lubricating oil entering the high-position tank 1 into cold oil.
  • the lubricating oil in the high-position fuel tank 1 is branched into the first oil supply ring pipe 6 and the second oil supply ring pipe 7 through the oil discharge manifold 5 and the three-way joint, and the first oil supply ring pipe 6 is guided by the fuel injection pipe 11 thereon.
  • the oil feed side of the bearing shoe 9 is injected, and the second oil supply ring pipe 7 is injected into the oil inlet side of the thrust tile 10 through the fuel injection pipe 11 thereon, and the lubricating oil after the thrust tile 10 and the guide bearing shoe 9 is changed.
  • the hot oil enters the oil sump 8 and circulates back and forth.
  • the row of the high-position fuel tank 1 is acted by the one-way exhaust valve 13 as the oil amount in the high-position fuel tank 1 increases.
  • the oil quantity is gradually the same as the oil input quantity of the high-position fuel tank 1.
  • the pressure in the high-position fuel tank 1 protects the equilibrium state, and the lubricating oil level in the oil tank 8 Located below the thrust pad 10, the thrust bearing begins normal operation.
  • This embodiment is basically the same as the above embodiment, and the main difference is that the high-position fuel tank 1 in the step b is provided with a single suction valve 12.
  • the single suction valve 12 is mainly used when the oil supply pump 3 cannot operate normally due to failure or power failure.
  • the implementation principle is as follows: when the oil supply pump 3 fails or is powered off and stops running, the oil supply pump 3 is no longer pumped into the high position tank 1 Lubricating oil, due to gravity, the high tank 1 can continue to supply lubricating oil to the thrust bearing; and, when the lubricating oil in the high tank 1 is discharged to a certain amount, the internal air pressure of the high tank 1 is lower than the external air pressure, at this time The suction valve 12 is opened, and the air is replenished into the high oil tank 1. Under the action of the external pressure, the lubricating oil in the high oil tank 1 can still be completely discharged into the oil tank 8 with the same oil output amount as that of the original oil supply pump 3.
  • the mirror plate 15, the bearing thrust head 14, the guide bearing shoe 9 and the thrust bearing 10 are all immersed in the lubricating oil, and the thrust bearing does not break the oil to cause the burning of the tile, thereby ensuring the safe and reliable operation of the thrust bearing. .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

一种降低组合推力轴承搅油损耗的方法，包括以下步骤：a、向油槽（8）内注入润滑油，使导轴承瓦（9）浸泡在润滑油中；b、设置一带单向排气阀（13）的高位油箱（1），使用供油泵（3）将油槽（8）内的润滑油注入高位油箱（1）内，并通过高位油箱（1）将润滑油注入镜板（15）与推力瓦（10）之间，和/或注入轴承推力头（14）与导轴承瓦（9）之间，使润滑油在油槽（8）与高位油箱（1）之间形成循环，高位油箱（1）的进油量大于高位油箱（1）的排油量；c、随着高位油箱（1）内油量的增加，通过单向排气阀（13）使高位油箱（1）的排油量与高位油箱（1）的进油量逐渐相同，此时油槽（8）内润滑油液位位于推力瓦（10）下方。该方法能够解决现有技术中推力轴承在工作时浸泡在润滑油内的问题，能够避免产生搅油损耗。

Description

一种降低组合推力轴承搅油损耗的方法 技术领域
本发明属于滑动轴承技术领域，尤其涉及一种降低组合推力轴承搅油损耗的方法，主要用于抽水蓄能发电机组。
背景技术
组合推力轴承是发电机组的重要组成部分，它起到支撑整个发电机重量的作用，其运行的安全性与可靠性直接关系到整个水轮发电机组的安全稳定运行。导轴承瓦和推力瓦都是推力轴承中的重要部件。
现有技术中，推力轴承主要由镜板、推力瓦、导轴承瓦和轴承推力头构成，镜板与推力瓦均位于导轴承瓦下方，推力瓦与镜板配合用于支撑发电机组的轴向负荷，导轴承瓦与轴承推力头配合用于限制机组转动的径向摆动。
目前，推力轴承的润滑供油方式主要采用浸泡润滑或直接供油润滑。
浸泡润滑是指预先向油槽内注入润滑油，使镜板、推力瓦、导轴承瓦和轴承推力头均浸泡在润滑油中。工作时，轴承推力头及镜板转动，带动润滑油在推力头与导轴承瓦之间和镜板与推力瓦之间形成油楔。但在实际使用过程中，由于推力瓦、导轴承瓦、镜板和轴承推力头均浸泡在润滑油中，而润滑油的粘度较大，这就导致机组在高速运行时，会产生很大的附加搅油损耗，从而降低了发电机运行效率。
直接供油润滑是指在推力瓦或导轴承瓦的进油边设置喷嘴或开设出油腔，使冷润滑油直接进入瓦块工作面。但这种供油方法在供油时，镜板工作面和轴承推力头仍然浸泡在润滑油中，仍然会因为润滑油粘度较大而产生很大的附加搅油损耗。
发明内容
本发明的目的在于克服现有技术中存在的上述问题，提供一种降低组合推力轴承搅油损耗的方法。本发明能够解决现有技术中推力轴承在工作时浸泡在润滑油内的问题，能够避免产生搅油损耗。
为实现上述目的，本发明采用的技术方案如下：
一种降低组合推力轴承搅油损耗的方法，其特征在于，包括以下步骤：
a、向油槽内注入润滑油，使导轴承瓦浸泡在润滑油中；
b、设置一带单向排气阀的高位油箱，该高位油箱的容积大于油槽中导轴承瓦上部与推力瓦底部之间区域内润滑油的体积，使用供油泵将油槽内的润滑油注入高位油箱内，并通过高位油箱将润滑油注入镜板与推力瓦之间，和/或注入轴承推力头与导轴承瓦之间，使润滑油在油槽与高位油箱之间形成循环，高位油箱的 进油量大于高位油箱的排油量；
c、随着高位油箱内油量的增加，通过单向排气阀使高位油箱的排油量与高位油箱的进油量逐渐相同，此时油槽内润滑油液位位于推力瓦下方。
所述步骤b中的高位油箱与供油泵之间设置有油冷器。
所述步骤b中的高位油箱上设置有单吸阀。
采用本发明的优点在于：
一、本发明中，在将油槽内的润滑油注入高位油箱的过程中，高位油箱中的空气由单向排气阀排出，随着高位油箱内油量的增加，高位油箱内的压力逐渐增大，直至大于外部气压，在压力的作用下，高位油箱的排油量逐渐增大，直至与高位油箱的进油量相同，从而使高位油箱内的润滑油保持在恒定状态。这样，在推力轴承正常运行时，就能够使油槽内的润滑油液位一直位于推力下方，即镜板、推力瓦、导轴承瓦和轴承推力头在推力轴承正常运行时均不会浸泡在润滑油中，解决了现有技术中推力轴承在工作时必须浸泡在润滑油内的问题，不仅能够避免产生搅油损耗，还有利于提高机组的运行效率。
二、本发明中，所述步骤b中的高位油箱与供油泵之间设置有油冷器，通过能够使进入高位油箱的热油变成冷油，既保证了润滑油的快速循环，又保证了对轴承的冷油供给，具有结构简单和成本低廉的优点。
三、本发明中，所述步骤b中的高位油箱上设置有单吸阀，通过单吸阀能够在供油泵掉电或停止运行时增大高位油箱内的压力，使高位油箱能够像供油泵在正常运行一样继续以原排油量向推力轴承瓦和导轴承瓦供油，有利于避免发生干摩擦或烧瓦现象。当高位油箱内的润滑油完全排放至油槽内时，镜板、推力瓦、导轴承瓦和轴承推力头均浸泡在润滑油中，从而能够像现有技术中的浸泡供油一样为推力轴承供油，保障推力轴承安全可靠的运行。
附图说明
图1为本发明中供油泵正常运行时的结构示意图；
图2为本发明中供油泵停止运行时的结构示意图；
图中的标记为：1、高位油箱，2、油冷器，3、供油泵，4、回油管，5、排油总管，6、第一供油环管，7、第二供油环管，8、油槽，9、导轴承瓦，10、推力瓦，11、喷油支管，12、单吸阀，13、单向排气阀，14、轴承推力头，15、镜板。
具体实施方式
实施例1
一种降低组合推力轴承搅油损耗的方法，包括以下步骤：
a、在推力轴承运行前，向油槽8内注入润滑油，使导轴承瓦9浸泡在润滑油中，此时推力瓦10、镜板15和轴承推力头14均浸泡在润滑油内；
b、设置一带单向排气阀13的高位油箱1，该高位油箱1的容积大于油槽8中导轴承瓦9上部与推力瓦10底部之间区域内润滑油的体积，使用供油泵3将 油槽8内的润滑油注入高位油箱1内，并通过高位油箱1将润滑油注入镜板15与推力瓦10之间，和/或注入轴承推力头14与导轴承瓦9之间，使润滑油在油槽8与高位油箱1之间形成循环，高位油箱1的进油量大于高位油箱1的排油量；
c、随着高位油箱1内油量的增加，通过单向排气阀13使高位油箱1的排油量与高位油箱1的进油量逐渐相同，此时高位油箱1内的压力处于平衡状态，油槽8内润滑油液位位于推力瓦10下方，推力轴承开始正常运行。
本实施例中，所述步骤b中的高位油箱1与供油泵3之间设置有油冷器2，通过油冷器2能够将供油泵3泵入的热油转换成冷油。
本实施例中，所述步骤b中高位油箱1的容积大于油槽8中导轴承瓦9上部与推力瓦10底部之间区域内润滑油的体积，是指高位油箱1的容积大于油槽8内润滑油初始液位至推力瓦10底部之间区域内润滑油的体积。
本实施例中，高位油箱1与油槽8通过回油管4连接，供油泵3和油冷器2均连接在回油管4上，油槽8、供油泵3、油冷器2、高位油箱1和推力轴承通过管道组成润滑油循环系统。
本实施例中，所述步骤b中高位油箱1向推力瓦10和/或导轴承瓦9供油可通过以下结构实现：
单独对导轴承瓦9供油时，设置一排油总管5与高位油箱1的排油口连接，在导轴承瓦9外径侧设置一带喷油支管11的第一供油环管6，第一供油环管6与排油总管5连接，喷油支管11设置在导轴承瓦9的进油边。
单独对推力瓦10供油时，设置一排油总管5与高位油箱1的排油口连接，在推力瓦10外径侧设置一带喷油支管11的第二供油环管7，第二供油环管7与排油总管5连接，喷油支管11设置在推力瓦10的进油边。
同时对导轴承瓦9和推力瓦10供油时，可综合上述两种方式，即设置一排油总管5，使其通过三通接头分别与第一供油环管6和第二供油环管7连接，就可实现同时对导轴承瓦9和推力瓦10供油。
本实施例的实施原理为，在推力轴承运行前，向油槽8内注入冷的润滑油，使导轴承瓦9浸泡在润滑油中，此时推力瓦10、镜板15和轴承推力头14均浸泡在润滑油内；启动供油泵3，供油泵3通过回流管将油槽8内的润滑油泵入高位油箱1内。其中，在泵入过程中，油冷器2使进入高位油箱1的润滑油变成冷油。高位油箱1内的润滑油通过排油总管5和三通接头分流进入第一供油环管6和第二供油环管7，第一供油环管6通过其上的喷油支管11向导轴承瓦9的进油边喷油，第二供油环管7通过其上的喷油支管11向推力瓦10的进油边喷油，经推力瓦10和导轴承瓦9后的润滑油变成热油进入油槽8内，并往复循环。在此过程中，由于高位油箱1的进油量大于高位油箱1的排油量，因此随着高位油箱1内油量的增加，在单向排气阀13的作用下，高位油箱1的排油量与高位油箱1的进油量逐渐相同，此时高位油箱1内的压力保护平衡状态，油槽8内润滑油液位 位于推力瓦10下方，推力轴承开始正常运行。
实施例2
本实施例与上述实施例基本相同，主要区别在于：所述步骤b中的高位油箱1上设置有单吸阀12。该单吸阀12主要在供油泵3因故障或掉电不能正常运行时使用，其实施原理如下：当供油泵3发生故障或掉电停止运行时，供油泵3不再向高位油箱1泵入润滑油，由于重力的缘故，高位油箱1能够继续向推力轴承供应润滑油；并且，当高位油箱1内的润滑油排放至一定量时，高位油箱1的内部气压低于外部气压，此时单吸阀12开启，空气补入高位油箱1，在外界压力的作用下，高位油箱1内的润滑油仍然能够以与原供油泵3泵入量相同的出油量完全地排放至油槽8内，当高位油箱1排空时，镜板15、轴承推力头14、导轴承瓦9和推力瓦10均浸泡在润滑油内，推力轴承不会断油而引起烧瓦，保证推力轴承安全可靠的运行。

Claims (3)

  1. 一种降低组合推力轴承搅油损耗的方法，其特征在于，包括以下步骤：
    a、向油槽内注入润滑油，使导轴承瓦浸泡在润滑油中；
    b、设置一带单向排气阀的高位油箱，该高位油箱的容积大于油槽中导轴承瓦上部与推力瓦底部之间区域内润滑油的体积，使用供油泵将油槽内的润滑油注入高位油箱内，并通过高位油箱将润滑油注入镜板与推力瓦之间，和/或注入轴承推力头与导轴承瓦之间，使润滑油在油槽与高位油箱之间形成循环，高位油箱的进油量大于高位油箱的排油量；
    c、随着高位油箱内油量的增加，通过单向排气阀使高位油箱的排油量与高位油箱的进油量逐渐相同，此时油槽内润滑油液位位于推力瓦下方。
  2. 如权利要求1所述的一种降低组合推力轴承搅油损耗的方法，其特征在于：所述步骤b中的高位油箱与供油泵之间设置有油冷器。
  3. 如权利要求1或2所述的一种降低组合推力轴承搅油损耗的方法，其特征在于：所述步骤b中的高位油箱上设置有单吸阀。
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